7*4+3y=21

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Solution for 7*4+3y=21 equation: 


Simplifying
7 * 4 + 3y = 21

Multiply 7 * 4
28 + 3y = 21

Solving
28 + 3y = 21

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-28' to each side of the equation.
28 + -28 + 3y = 21 + -28

Combine like terms: 28 + -28 = 0
0 + 3y = 21 + -28
3y = 21 + -28

Combine like terms: 21 + -28 = -7
3y = -7

Divide each side by '3'.
y = -2.333333333

Simplifying
y = -2.333333333

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